adg016

I searched for "reflash," but not much came up. I know TRD does a mild one, but is anyone offering these for higher performance applications.

Perhaps something to be able to take even more advantage of increased airflow due to bolt-ons and head work?

Oh, and I know this board has its loyalists, but is there another board that is very "techy"?

senseiturtle

TRD's reflash is for the supercharger only, and "mild" is the keyword.

There is no reflash available for the tC since toyota's ECU hasn't been "cracked" by aftermarket tuners. All fuel-map adjustments must be made with a piggyback, such as greddy eManage, SAFCII, CamCon, etc.

IceNine

Actually the TRD reflash isn't "mild", it's simply "different" (completely different injector pulse tune since the TRD SC kit has larger injectors, as well as an AFR profile specific to the SC).

adg016

Got it.

mattvs

And even with the piggy-backs, you're only able to tune under WOT.


To sum it up, it ain't worth it unless you're running a snail.

IceNine

No, not just WOT... That's a pretty common misconception about piggybacks...

It's basically whenever you are in open loop, which is Engine startup, when the engine is cold (idle), during cutoff, and WOT.

You wouldn't WANT to tune our systems in closed loop, since while in closed loop our factory ECU "learns" so we get optimal fuel efficiency and cat efficiency (if you have one).

The most relevant is Cold/Idle and WOT. The factory ECU takes over for all closed-loop applications, which from a tuning perspective, is just fine.

Edit: though for the record, yeah, there's not much to be gained from tuning a N/A car.... Essentially you tune a F/I car so you can deliver fuel optimally to avoid leaning out/detonation.

adg016

Even on a car running I/H/E/P, throttle body, ported intake manf, and ported, matched, and polished head??

IceNine

I doubt it would be necessary as your ECU will still likely be able to adjust to the improved flow.

senseiturtle

On a V8, tuning fuel maps for N/A is very efficient.

On our 4-bangers, expect perhaps 10-15 tops from a tune if you've got all the above mods. Not very good power per dollar.

soros151

Dezod is about to realease their EMS to control the A/F at all times. Whatever u input, that's what gonna be.